Questions
Which is true for an element R present in group 13 of the periodic table
detailed solution
Correct option is C
All 13th group elements are solids at room temperature ,except "Ga" ,Ga exist as liquid at room temperature .→ 13th group elements maximum oxidation state is +3 due to the presence of three valence electrons in their valency shell.→ 13th group elements forms the oxides with the formula M2O3 [ R2O3 ].→ 13th group elements forms the halides with the formula MX3 [RX3],since their valency is three ,therefore they will combine with three halogen atoms.For writing formula of the compound we need to follow above shown CRISS-CROSS METHOD.Similar Questions
The bond dissociation energy of BF bond in BF3 is 646 kJ mol–1 whereas that of CF in CF4 is 315 kJ mol–1. The correct reason for higher BF bond dissociation energy as compared to that of CF bond is :
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